Enantioselective Synthesis of Tertiary Trifluoromethyl Carbinols by Vinylogous Aldol Reaction of 3-Methylcyclohex-2-en-1-one with (Het)aryl Trifluoromethyl Ketones

摘要

A direct enantioselective vinylogous aldol reaction of trifluoromethyl ketones with 3-methylcyclohex-2-en-1-one through hydrogen-bond-directing dienamine catalysis by a diamine-sulfonamide catalyst has been demonstrated. A range of trifluoromethylated tertiary alcohols were efficiently produced in yields of up to 86% and with 93% enantioselectivity.